malicious mischief

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The unlawful destruction of another's property, done with intent to cause injury or loss of use of the property, or with reckless disregard of the owner's rights.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Law) Malicious and willful destructionof or injury to the property of others; -- it is an offense at common law.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun law The willful, wanton, or reckless destruction of the personal property of another occasioned by actual ill will or resentment toward the owner or possessor of such property.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun willful wanton and malicious destruction of the property of others